/*
 * chombo: Hadoop Map Reduce utility
 * Author: Pranab Ghosh
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You may
 * obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0 
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package org.chombo.stats;


/**
 * Incremental average
 * @author pranab
 *
 */
public class IncrementalSimpleStat implements AverageValue {
	private double avgValue;
	private long count;
	
	public void add(double value) {
		++count;
		avgValue += (value - avgValue) / count;
	}
	
	public double getAvgValue() {
		return avgValue;
	}
	
	@Override
	public void setMean(double avgValue) {
		this.avgValue = avgValue;
	}

	@Override
	public double getMean() {
		return avgValue;
	}
	
}
